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  • BSI
    BS EN IEC 62788-6-2:2020 Measurement procedures for materials used in photovoltaic modules - General tests. Moisture permeation testing of polymeric materials
    Edition: 2020
    $435.35
    / user per year

Description of BS EN IEC 62788-6-2:2020 2020

This document provides methods for measuring the steady-state water vapour transmission rate (WVTR), water vapour permeability (P), diffusivity (D), solubility (S), and moisture breakthrough time (Ƭ10) (defined as the time to reach 10 % of the steady state WVTR) for polymeric materials such as encapsulants, edge seals, frontsheets and backsheets. These measurements can be made at selected temperatures and humidity levels as deemed appropriate for evaluation of their performance in PV modules. Measurement is accomplished by inspection of the transient WVTR curve and by fitting it to a theoretical Fickian model. This document is best applied to monolithic films. If multilayer films are used, the D and S values are only apparent values, but the steady-state values can still be measured.

This document was written for the measurement of water permeation, but it can equally be used for other permeants such as O2. In this case the same diffusion equations, fitting procedures, and scaling arguments are used.



Standard NumberBS EN IEC 62788-6-2:2020
TitleMeasurement procedures for materials used in photovoltaic modules - General tests. Moisture permeation testing of polymeric materials
StatusDefinitive
Publication Date2020-05-13
Identical National Standard OfIEC 62788-6-2 Ed1.0, EN IEC 62788-6-2:2020
DescriptorsDimensions, Modules, Sheet materials, Photovoltaic cells, Measurement
ICS27.160 Solar energy engineering
CommitteeGEL/82
ISBN978 0 580 96639 2
PublisherBSI
Pages24

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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